Insert molding method and insert molding component

An insert molding component comprising:

• a primary molding section having a concave portion formed in one surface thereof, the concave portion including a lower concave portion and an upper concave portion, and the lower and upper concave portions being stepped portions in which an area of an opening of the upper concave portion is larger than an area of an opening of the lower concave portion, the lower concave portion including a bottom surface, and the upper concave portion including a groove portion;
• an insert component disposed in contact with the bottom surface of the lower concave portion;
• a heat-insulating component disposed in the upper concave portion, above the opening of the lower concave portion in which the insert component is disposed;
• and
• a secondary molding section disposed in contact with the one surface of the primary molding section,
• wherein the groove portion is disposed at a periphery of the upper concave portion and extends in a direction away from the one surface of the primary molding section such that a portion of the primary molding section intervenes between the groove portion and the lower concave portion along a direction parallel to the one surface of the primary molding section.